What does this equal too(2x-5)^2
Answer:
4x² - 20x + 25
Step-by-step explanation:
(2x-5)² means (2x-5)(2x-5)
Expand the brackets.
1. do 2x times 2x = 4x²
2. do 2x times -5 = -10x
3. -5 times 2x = -10x
4. -5 times -5 = 25
Altogether it is 4x² - 10x - 10x + 25
This simplifies to 4x² -20x + 25.
A random sample of 12 chemists from Washington stats shows an average salary of $39,420 with a standard deviation of $1659. A random sample of 26 chemists from New Mexico has an average salary of $30,215 with a standard deviation of $4116. Find the 98% confidence interval of the difference of means.
Answer:
Step-by-step explanation:
Given that :
μ1 = 39420 ; σ1 = 1659 ; s1 = 12
μ2 = 30215 ; σ2 = 4116 ; s2 = 26
df1 = 12 - 1 = 11
df2 = 26 - 1 = 25
98 % confidence interval of the difference in sample means :
Pooled Variance :
S²p = ((df1 * s1²) + (df2 * s2²)) / (df1 + df2)
((11×1659^2)+(25×4116^2))÷(11+25) = 12605874.75
Standard Error :
√(S²p/n1) + (S²p/n2)
√(12605874.75/12) + (12605874.75/26)
= 1239.0847
Fiona, Richard and pip share some money in the ratio of 3:5:1. Fiona and pip receive £12. How much does Richard get
Answer:
£15
Step-by-step explanation:
just is innit
i need some help with this
Solve
4 - 3|x + 1| < -17
Answer: x > 6, x < -8
Subtract 4 from both sides.
−3∣x+1∣<−17−4
Then simplify -17 - 4 to -21.
−3∣x+1∣<−21
Divide both sides by −3.
|x + 1| > -21/-3
Two negatives make a positive.
|x + 1| > 21/3
simplify 21/3 to 7
Break down the problem into these 2 equations.
x + 1 > 7
-(x + 1) > 7
Solve the 1st equation: x + 1 > 7
x > 6
Solve the 2nd equation: -(x + 1) > 7
x < -8
last collect all solutions
x > 6, x < -8
answer thisss please
Answer:
Real numbers: Tick all of the numbers
Rational numbers: Tick all except 3.55687143...
Irrational numbers: Tick 3.55687143...
Integers: Tick 7 and -18
Whole number: Tick 7
Step-by-step explanation:
Real numbers are basically any number.
Rational numbers are numvers which can be converted into a fraction.
Irrational numbers are numbers which cannot be converted into a fraction.
Integers are whole numbers including negative numbers.
Whole numbers are the same as integers but do not include negative numbers.
7x-9x what is the answer
Answer:
-2x
Step-by-step explanation:
The expression itself is -2x. We subtract the coefficients 7 and 9 to get -2.
Answer:
-2x
Step-by-step explanation:
7-9=-2 since they have the same variable they can be simplified
In AABC, the measure of ZB=90°, AC = 50,
CB = 30, and BA = 40. What ratio
represents the tangent of ZA?
Help ASAP please!!!!
Answer:
tanA = 3/4
General Formulas and Concepts:
Trigonometry
tan∅ = opposite over adjacentStep-by-step explanation:
Step 1: Define
Looking at ∠A, finding tangent
Step 2: Identify
opposite leg of ∠A = CB = 30
adjacent leg of ∠A = AB = 40
Step 3: Write ratio
Substitute: tanA = 30/40Simplify: tanA = 3/4And we have our final answer!
QUICK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! The ratio of the hours the Teenage Mutant Ninja Turtles spend training,
to the hours they spend eating pizza is 8:3. If they spend 24 hours
training, how much time do they spend eating pizza?
A 6
B 12
C 9
D 36
Answer:
6 hours
The difference between the ratio numbers is 8-3 = 5. That corresponds to the 10-hour difference between training hours and pizza-eating hours. Thus, each ratio unit stands for 2 hours. The 3 ratio units spent eating pizza stand for ...
3×2 hours = 6 hours eating pizza
Step-by-step explanation:Hopefully this helped, if not HMU and I will get u a better answer!
and get i get brainliest plz, im trying to upgrade my statis
Lyle has a bowl that contains 0.8
kilogram of salt. He uses a spoon to
remove 850 centigrams of salt. How
much salt, in centigrams, remains?
Answer:79150 Centigrams
Step-by-step explanation:
Which statement BEST describes the factors that affect muscular endurance? A. size of the muscle cells, ability to store fuel, and blood supply to the muscles B. number of muscles, amount of exercise, and type of person C. level of flexibility, amount of exercise, and ability to store fuel D. blood supply to the muscle, type of exercise, and type of muscle cells Please select the best answer from the choices provided. A B C D
Answer:
A
Step-by-step explanation:
I took the test
Answer:
its A like he said see
Step-by-step explanation:
FIANCE 50 POINTS
How does the concept of beta impacts financial decision making?
Answer:
The concept of beta impacts financial decision making by providing information volatility or systematic risk of a security.
The information that provided by the concept of beta would take form in a comparison between your chosen securities with other securities that exist in the market. For investors who prefer low risk but small and steady return, they can use the concept of beta to find out the securities with low level of volatility.
Step-by-step explanation: I hope this helps! If not sorry!
Help thanks please number 7
The absolute value of a number is 16.what is this number?select all that apply
Answer:
A and E
Step-by-step explanation:
| 16 | = 16
|-16| = 16
HELP ME PLSSS Which of the following number sentences is an example of the associative property of multiplication?
O (12 * 3) 8 = 12 (3 x 8)
6x1 = 6
4* 5 = 5 x4
20 * (10 + 6) = (20 x 10) + (20 * 6)
Answer:
The first or third one
Step-by-step explanation:
Associative property is where you can switch the place of the digits and it still have the same answer in the end.
3x - 17 = 2x + 35
Please help
Answer:
[tex]x = 52[/tex]
Step-by-step explanation:
We have the following equation:
[tex]3x -17=2x+35[/tex]
First we simplify the numbers.
[tex]3x -17+17=2x+35+17[/tex]
[tex]3x=2x+52[/tex]
[tex]3x-2x=2x-2x+52[/tex]
[tex]x=52[/tex]
Answer:
x = 52
General Formulas and Concepts:
Order of Operations: BPEMDAS
Step-by-step explanation:
Step 1: Define equation
3x - 17 = 2x + 35
Step 2: Solve for x
Subtract 2x on both sides: x - 17 = 35Add 17 to both sides: x = 52Step 3: Check
Plug in x to verify it's a solution.
Substitute: 3(52) - 17 = 2(52) + 35Multiply: 156 - 17 = 104 + 35Subtract/Add: 139 = 139Which verbal expression best represents the algebraic expression
below?
2
13x + 9
13 plus x squared plus 9
The product of 13 times x squared and 9
13 times x squared less 9
13 times x squared plus 9
Answer:
imma go with 13 times x squared plus 9
but the equation has nothing squared 13x+9
A casting director wishes to find one male and one female to cast in his play if he plans to audition seven males and eight females in how many different ways can this be done
There are 7 males and 8 females out of which we 1 male and 1 female is to be selected.
Number of ways to select 1 male from 7 are [tex]^7C_1[/tex].
Number of ways to select 1 female from 8 are [tex]^8C_1[/tex].
So, number of ways to select 1 male and 2 female is :
[tex]n = ^7C_1 \times ^8C_1\\\\n = 56[/tex]
Therefore, total number of ways are 56.
Hence, this is the required solution.
circle columns to break apart the array into two parts 6rolls 7columns
Find the value of x.
51/5=? In long division
Answer: 10.2
I hope that this helps! :3
Answer:
51/5 = 10 with a remainder of 1
Step-by-step explanation:
10
5 | 51 (The '|' is the part implying division)
-5
----------- (These are equal signs)
01
- 0
------------
1
(Sorry if this looks confusing)
The proof that HG ≅ EG is shown.
Given: G is the midpoint of KF
KH ∥ EF
Prove: HG ≅ EG
Triangles F E G and K H G are connected at point G.
What is the missing reason in the proof?
Statement
Reason
1. ∠EGF ≅ ∠HGK 1. vert. ∠s are ≅
2. KH ∥ EF 2. given
3. ∠F ≅ ∠K 3. alt. int. ∠s are ≅
4. G is the midpoint of KF 4. given
5. FG ≅ KG 5. def. of midpt.
6. △FEG ≅ △KHG 6. ?
7. HG ≅ EG 7. CPCTC
SAS
ASA
AAS
HL
Answer:
ASA
Step-by-step explanation:
The Proof proves that two of the angles and the included side are equal making it the ASA theorem
The missing reason in the given proof is ASA.
What is Congruence of Triangles?Two or more triangles are said to be congruent if and only if sides and angles of one triangle is equal to the corresponding sides and angles of another triangle.
Given is a proof for the congruence of the lines HG and EG.
Given,
G is the midpoint of KF.
KH ∥ EF
Triangles F E G and K H G are connected at point G.
We have to prove HG ≅ EG.
From the given steps of proof,
we get two angles and the included side of triangle FEG is congruent to corresponding two angles and the included side of triangle KHG.
So by ASA theorem both triangles are congruent.
Hence the missing reason is ASA.
Learn more about Congruence Rules here :
https://brainly.com/question/20521780
#SPJ7
22=x how do I solve for that it’s to study for kids
What is the rule for finding the distance of a point when the points are in the same Quadrant?
Number 13 thanks pls ASAP ASAP
Please help or at least try and also I’m so sorry if u can’t read it well
100 points free after yo answer the question
Answer:
Sandra's speed was consistent and persistent she proved it by lining up the segments she placed on the graph and at what time as well.
Answer:
I can't see it...
Step-by-step explanation:
Can you ask me the question in the comments?
Help Please, 15pts A family buys 2 personal watercrafts for $3,495 each. The family makes $10 equal payments for the watercrafts. What is the amount of each payment?
Answer:
699 I'm not a 100% sure trying to help
Step-by-step explanation:
3,495×2= 6,990÷ 10= 699
not a 100% sure just trying to help
29/25 as a percent help me
Answer
116%
hope this helps!!!!!!!!!!!!!!!!!
Approximately 8% of all people have blue eyes. Out of a random sample of 20 people, what is the probability that at most 2 people have blue eyes
Answer:
1 is the answer good luck